This undated frame grab image from video provided by British Petroleum shows oil gushing from the blown well.AP

Congressman Ed Markey (D-Mass.) Tuesday expressed outrage that BP will kill the live camera feed of the oil spill at the bottom of the Gulf of Mexico as the oil giant makes yet another attempt to cap the well.

BP said Tuesday it was preparing within days to attempt a so-called “top kill” operation, where heavy drilling fluids would be injected in to the well to stem the flow of oil and gas “and, ultimately, kill the well.”

“It is outrageous that BP would kill the video feed for the top kill. This BP blackout will obscure a vital moment in this disaster,” said Markey, who demanded the live feed earlier this month to allow Americans to glimpse the underwater impact of the spill.

“No one wants to interfere with the operations during the top kill. With those preparations mostly done, now the world should see whether or not this strategy works, and we should see it in real time,” Markey said in a statement.

All of BP’s attempts to stop the leak so far have failed, despite the use of advanced deep sea technology including submarine robots.

The leak was caused when the Deepwater Horizon rig, which had been drilling the well for BP, exploded April 20 and sank two days later, killing 11 crew members.